Patent Number: 7,732,983

Title: Ultrasonic motor

Abstract: A ultrasonic motor includes a piezoelectric device, and friction contact members moves a driven body by a elliptical vibration. And the ultrasonic motor includes a holder member which is disposed corresponding to a node of a longitudinal vibration or in the vicinity thereof on the face of the piezoelectric device and a node of a flexural vibration or in the vicinity thereof, the holder member having an engagement convex portion and being provided with a pair of sliding contact projection portions, a position limiting member which has accommodation holes each constituted of a sliding contact concave portion for accommodating the sliding contact projection portion such that it makes a sliding contact therewith freely and an engagement concave portion for accommodating the engagement convex portion, and a pressure member which presses the holder member so as to bring the friction contact members into pressure contact with the driven body.

Inventors: Kasai; Yasuaki (Saitama, JP)

Assignee: Olympus Corporation

International Classification: H02N 2/00 (20060101)

Expiration Date: 2022-06-08 0:00:00